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Abstract:

A method for implementing power saving of an access point on a wireless
communication network includes: when detecting that no mobile terminal is
associated, switching, by the access point, from a normal working mode to
a power saving working mode; and periodically broadcasting, by the access
point, a simplified beacon frame in the power saving working mode, where
the simplified frame includes only a service set identity. An embodiment
of the present invention further provides an access point on a wireless
communication network. The access point broadcasts the simplified beacon
frame in the power saving working mode. Therefore, the length of the
beacon frame is shortened, thereby shortening the sending time to achieve
the objective of reducing power consumption.

Claims:

1. A method for implementing power saving of an access point on a
wireless communication network, comprising: switching, by the access
point, from a normal working mode to a power saving working mode after
detecting that no mobile terminal is associated; and periodically
broadcasting, by the access point, a simplified beacon frame in the power
saving working mode, wherein the simplified beacon frame comprises only a
service set identity.

2. The method according to claim 1, further comprising: when the access
point receives an access request message in the power saving working
mode, if the access request message is a probe request message for the
access point, returning, by the access point, a probe response message to
a mobile terminal that sends the probe request message, and continuing
working in the power saving working mode; if the access request message
is a connection request message, entering, by the access point, to the
normal working mode.

3. The method according to claim 1, wherein in the power saving working
mode, a beacon frame sending interval used by the access point for
periodically broadcasting the simplified beacon frame is longer than the
beacon frame sending interval used in the normal working mode.

4. The method according to claim 2, wherein in the power saving working
mode, a beacon frame sending interval used by the access point for
periodically broadcasting the simplified beacon frame is longer than the
beacon frame sending interval used in the normal working mode.

5. The method according to claim 1, after the access point broadcasts a
beacon frame, in a beacon frame sending interval, comprising: if no
access request message of a mobile terminal is received within a counting
time, disabling an antenna and entering a dormant state.

6. The method according to claim 2, after the access point broadcasts a
beacon frame, in a beacon frame sending interval, comprising: if no
access request message of a mobile terminal is received within a counting
time, disabling an antenna and entering a dormant state.

7. The method according to claim 3, after the access point broadcasts a
beacon frame, in a beacon frame sending interval, comprising: if no
access request message of a mobile terminal is received within a counting
time, disabling an antenna and entering a dormant state.

8. The method according to claim 4, after the access point broadcasts a
beacon frame, in a beacon frame sending interval, comprising: if no
access request message of a mobile terminal is received within a counting
time, disabling an antenna and entering a dormant state.

9. The method according to claim 1, wherein the method is applied on a
Wi-Fi network.

10. An access point on a wireless communication network, comprising: a
working mode switchover module, configured to switch the working mode of
the access point from a normal working mode to a power saving working
mode, when it is detected that no mobile terminal is associated to the
access point; and an information broadcast module, configured to
periodically broadcast a simplified beacon frame in the power saving
working mode, wherein the simplified beacon frame comprises only a
service set identity.

11. The access point according to claim 10, further comprising: an access
request processing module, configured to receive an access request
message in the power saving working mode, wherein if the access request
message is a probe request message for the access point, the access
request processing module is further configured to: return a probe
response message to a mobile terminal that sends the probe request
message and continue working in the power saving working mode; if the
access request message is a connection request message, the access
request processing module is further configured to: trigger the working
mode switchover module to switch the working mode of the access point to
the normal working mode.

12. The access point according to claim 10, wherein in the power saving
working mode, the beacon frame sending interval used by the information
broadcast module for periodically broadcasting the simplified beacon
frame is longer than the beacon frame sending interval used in the normal
working mode.

13. The access point according to claim 11, wherein in the power saving
working mode, the beacon frame sending interval used by the information
broadcast module for periodically broadcasting the simplified beacon
frame is longer than the beacon frame sending interval used in the normal
working mode.

14. The access point according to claim 10, wherein after the information
broadcast module broadcasts a simplified beacon frame, in a beacon frame
sending interval, the working mode switchover module is further
configured to disable an antenna and enter a dormant state if no access
request message of an mobile terminal is received within a counting time.

15. The access point according to claim 11, wherein after the information
broadcast module broadcasts a simplified beacon frame, in a beacon frame
sending interval, the working mode switchover module is further
configured to disable an antenna and enter a dormant state if no access
request message of an mobile terminal is received within a counting time.

16. The access point according to claim 12, wherein after the information
broadcast module broadcasts a simplified beacon frame, in a beacon frame
sending interval, the working mode switchover module is further
configured to disable an antenna and enter a dormant state if no access
request message of an mobile terminal is received within a counting time.

17. The access point according to claim 13, wherein after the information
broadcast module broadcasts a simplified beacon frame, in a beacon frame
sending interval, the working mode switchover module is further
configured to disable an antenna and enter a dormant state if no access
request message of an mobile terminal is received within a counting time.

18. The access point according to claim 10, wherein the wireless
communication network is specifically a wireless fidelity Wi-Fi network.

Description:

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is a continuation of International Application No.
PCT/CN2012/077489, filed on Jun. 26, 2012, which claims priority to
Chinese Patent Application No. 201110234734.2, filed on Aug. 16, 2011,
both of which are hereby reference in their entireties.

FIELD OF THE INVENTION

[0002] The present invention relates to the field of wireless
communication technologies, and in particular to a method for
implementing power saving of an access point and the access point on a
wireless communication network.

BACKGROUND OF THE INVENTION

[0003] As a short-distance wireless communication technology, Wi-Fi
(Wireless Fidelity, wireless fidelity) technology features advantages,
such as convenient usage and high transmission speed, and is widely used
in construction of a wireless local area network, access to a wide area
network, and the like.

[0004] How to implement power saving in a communication system has become
a problem that increasingly attracts attention in the industry. However,
there is no power saving solution for an AP (Access Point, access point)
on a Wi-Fi network at present. Therefore, power consumption of the AP is
relatively high in the prior art.

SUMMARY OF THE INVENTION

[0005] Embodiments of the present invention provide a method for
implementing power saving of an access point and the access point on a
wireless communication network, and thereby resolving the problem of
relatively high power consumption of the access point.

[0006] The objective of the present invention is achieved by using the
following technical solutions:

[0007] A method for implementing power saving of an access point on a
wireless communication network includes:

[0008] switching, by the access point, from a normal working mode to a
power saving working mode after detecting that no mobile terminal is
associated; and

[0009] periodically broadcasting, by the access point, a simplified beacon
frame in the power saving working mode, where the simplified beacon frame
includes only a service set identity.

[0010] An access point on a wireless communication network includes:

[0011] a working mode switchover module, configured to switch the working
mode of the access point from a normal working mode to a power saving
working mode, when it is detected that no mobile terminal is associated
to the access point; and

[0012] an information broadcast module, configured to periodically
broadcast a simplified beacon frame in the power saving working mode,
where the simplified beacon frame includes only a service set identity.

[0013] It can be seen from the technical solutions provided in the
embodiments of the present invention that, in the embodiments of the
present invention, the access point broadcasts a simplified beacon frame
in the power saving working mode. Therefore, the length of the beacon
frame is shortened, thereby shortening the sending time to achieve the
objective of reducing power consumption.

BRIEF DESCRIPTION OF THE DRAWINGS

[0014] To illustrate the technical solutions in the embodiments of the
present invention more clearly, the following briefly describes the
accompanying drawings for describing the embodiments. Apparently, the
accompanying drawings in the following description merely show some
embodiments of the present invention, and persons of ordinary skill in
the art can derive other drawings from these accompanying drawings
without creative efforts.

[0015] FIG. 1 is a flow chart of a method according to an embodiment of
the present invention;

[0016] FIG. 2 is a flow chart of a method according to an application
embodiment of the present invention;

[0017]FIG. 3 is a flow chart of a method according to another application
embodiment of the present invention; and

[0018]FIG. 4 is a schematic structural diagram of an access point
according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following clearly and completely describes the technical
solutions according to the embodiments of the present invention with
reference to the accompanying drawings in the embodiments of the present
invention. Apparently, the embodiments in the following description are
merely a part rather than all of the embodiments of the present
invention. All other embodiments obtained by persons of ordinary skill in
the art based on the embodiments of the present invention without
creative efforts shall fall within the protection scope of the present
invention.

[0020] An embodiment of the present invention provides a method for
implementing power saving of an access point on a wireless communication
network. As shown in FIG. 1, its implementation manner specifically
includes the following operations:

[0021] S101. When detecting that no mobile terminal is associated, the
access point switches from a normal working mode to a power saving
working mode.

[0022] S102. The access point periodically broadcasts a simplified Beacon
(beacon) frame in the power saving working mode, where the simplified
Beacon frame includes only an SSID (Service Set Identity, service set
identity).

[0023] According to the method provided in the embodiment of the present
invention, the access point broadcasts a simplified beacon frame in the
power saving working mode. Therefore, the length of the beacon frame is
shortened, thereby shortening the sending time to achieve the objective
of reducing power consumption.

[0024] In the embodiment of the present invention, when the access point
receives an access request message in the power saving working mode,
perform S103 if the access request message is a probe request message for
the access point; or perform S104 if the access request message is a
connection request message.

[0025] S103. The access point returns a probe response message to a mobile
terminal that sends the probe request message and continues working in
the power saving working mode. The specific implementation manner may be
as follows: The access point waits for a connection request message after
responding to the probe request message; if receiving a connection
request message within a counting time, the access point enters the
normal working mode; if receiving no connection request message within
the counting time, the access point continues working in the power saving
working mode.

[0026] S104. The access point enters the normal working mode.

[0027] The method provided in the embodiment of the present invention
implements power saving of the access point and further ensures that the
access point is capable of responding to the access request of the mobile
terminal in time.

[0028] The access point may further receive the broadcast probe request
message, and the mobile terminal that sends the broadcast probe request
message may not send the subsequent connection request message to the
access point. Therefore, to avoid frequent working mode switchover and
further implement power saving, the access point does not respond to the
received broadcast probe request message in the embodiment of the present
invention.

[0029] In the embodiment of the present invention, the sending interval of
a simplified Beacon frame may further be lengthened to reduce the sending
frequency of a Beacon frame, thereby further reducing power consumption
to implement power saving of the access point. Accordingly, in the power
saving working mode, the BI (Beacon Interval, beacon frame sending
interval) used by the access point for periodically broadcasting the
simplified Beacon frame is longer than the BI used in the normal working
mode. In the power saving working mode, the BI may increase in a gradual
lengthening manner. However, the BI value cannot increase unlimitedly. It
is necessary to consider the balance between the Beacon sending times
reduced by increasing the BI and the time on which a network is found by
a newly come STA.

[0030] To further reduce power consumption and implement power saving of
the access point, after the access point broadcasts a simplified Beacon
frame, in one BI, the method provided in the embodiment of the present
invention may further include: waiting, by the access point, after
broadcasting a simplified Beacon frame, to receive the access request
message of the mobile terminal; entering a dormant state if no access
request message is received within the scheduled counting time; enabling,
when the BI ends, an antenna to broadcast a next simplified Beacon frame;
and proceeding with S103 or S104 if the access request message is
received within the scheduled time.

[0031] The access request message in the embodiment of the present
invention indicates a series of messages sent by a mobile terminal in a
network access process.

[0032] The method provided in the embodiment of the present invention is
applied on a wireless communication network, and especially may be
applied on a Wi-Fi network.

[0033] The following details a specific implementation manner in the
actual application process of the embodiment of the present invention.

[0034] By taking the Wi-Fi network as an example, in one application
embodiment of the present invention, a method for implementing power
saving of an access point is shown in FIG. 2. The following operations
are specifically included:

[0035] The access point (AP for short) on the Wi-Fi network works in a
normal working mode.

[0036] S201. If detecting that no mobile terminal (STA for short) is
associated with the AP, the AP switches to a power saving working mode.

[0037] Specifically, the AP may switch to the power saving working mode if
not detecting an STA in a continuous period of time.

[0038] S202. The AP periodically broadcasts a simplified Beacon frame,
where the simplified Beacon frame includes only an SSID.

[0039] Compared with an existing Beacon frame, mandatory content such as
Timestamp (timestamp), BI (beacon frame sending interval), and Supported
Rate (supported rate), and optional parameters such as the FH (frequency
hopping) parameter, the DS (distributed system) parameter, the CF
(contention free) parameter, and the IBSS (independent basic service set)
parameter, are stripped from the simplified Beacon frame. Therefore, the
length of a Beacon frame is greatly shortened, thereby shortening the
sending time and reducing power consumption of the AP to implement power
saving.

[0040] In addition, the BI for the AP to broadcast the simplified Beacon
frame may be longer than the BI for broadcasting the Beacon frame in the
normal working mode. Power consumption is further reduced by reducing the
sending frequency of the Beacon frame to implement power saving.

[0041] When an STA enters the coverage range of the AP and sends an access
request message to the AP,

[0042] if the access request message is a connection request message,
perform S203 where the AP switches from the power saving working mode to
the normal working mode,

[0043] where the access request message may be but is not limited to: an
Authentication (authentication) message, an Association (association)
message, or a Reassociation (reassociation) message; or

[0044] if the access request message is a Probe Request (probe request)
message, perform S204 where the AP returns a Probe Response (probe
response) message to the STA and waits for the STA to continue to send
the connection request message, and perform S205.

[0045] S205. If receiving the connection request message sent by the STA
within a counting time, the AP switches from the power saving working
mode to the normal working mode, sends a regular Beacon frame, and
performs message interaction with the STA in a network access process; if
receiving no access request message from any STA within the counting
time, the AP continues working in the power saving working mode.

[0046] In another application embodiment of the present invention, an AP
may further enter a dormant mode in the BI between broadcasting two
Beacon frames to further reduce power consumption and implement power
saving. As shown in FIG. 3, its implementation manner specifically
includes the following operations:

[0047] The AP on a Wi-Fi network works in a power saving working mode and
periodically broadcasts a simplified Beacon frame, where the simplified
Beacon frame includes only an SSID. The BI for the AP to broadcast the
simplified Beacon frame may be longer than the BI for broadcasting a
Beacon frame in a normal working mode.

[0048] S301. After broadcasting a simplified Beacon frame, the AP waits to
receive an access request message of an STA, such as a Probe Request
message, an Authentication message, an Association message, or a
Reassociation message.

[0049] If no access request message of any STA is received within a
scheduled counting time, perform S302 where the AP disables an antenna
and enters the dormant mode.

[0050] If an access request message of an STA is received within the
scheduled time and the access request message is a Probe Request message,
perform S303 where the AP returns a Probe Response message to the STA and
continues to wait for a connection request message of the STA, and
perform S304.

[0051] S304. If the connection request message of the STA is received
within the scheduled counting time, switch from the power saving working
mode to the normal working mode, send a regular Beacon frame, and perform
message interaction with the STA in a network access process; if no
access request message is received within the scheduled time, the AP
disables the antenna and enters the dormant mode.

[0052] If an access request message of an STA is received within the
scheduled time and the access request message is a connection request
message, perform S305 where the AP switches to the normal working mode,
sends a regular Beacon frame, and performs message interaction with the
STA in a network access process.

[0053] The dormant mode of the AP ends when a BI ends. The AP wakes up,
continues to broadcast a next simplified Beacon frame, and repeats S301.

[0054] All or a part of steps of the methods in the embodiments may be
implemented by a program instructing related hardware. The program may be
stored in a computer readable medium. When the program is run, the
processes of the methods in the embodiments are performed. The storage
medium includes any medium that can store program codes, such as a ROM, a
RAM, a magnetic disk, or an optical disk.

[0055] An embodiment of the preset invention further provides an access
point on a wireless communication network. As shown in FIG. 4, the
specific implementation structure includes:

[0056] a working mode switchover module 401, configured to switch the
working mode of the access point from a normal working mode to a power
saving working mode, when it is detected that no mobile terminal is
associated to the access point; and

[0057] an information broadcast module 402, configured to periodically
broadcast a simplified beacon frame in the power saving working mode,
where the simplified beacon frame includes only a service set identity.

[0058] The access point provided in the embodiment of the presentation
broadcasts a simplified beacon frame in the power saving working mode.
Therefore, the length of the beacon frame is shortened, thereby
shortening the sending time to achieve the objective of reducing power
consumption.

[0059] The access point provided in the embodiment of the presentation
further includes an access request processing module 403, configured to
receive an access request message in the power saving working mode.

[0060] If the access request message is a probe request message for the
access point, the access request processing module 403 is further
configured to return a probe response message to a mobile terminal that
sends the probe request message and enable the access point to continue
working in the power saving working mode. Specifically, after responding
to the probe request message, a connection request message is waited for.
If a connection request message is received within a counting time, the
working mode switchover module 401 is triggered to switch the working
mode of the access point to the normal working mode; if no connection
request message is received, the working mode switchover module 401 is
not triggered, so that the access point continues working in the power
saving working mode.

[0061] If the access request message is a connection request message, the
access request processing module 403 is further configured to trigger the
working mode switchover module 401 to switch the working mode of the
access point to the normal working mode.

[0062] The access point provided in the embodiment of the presentation
implements power saving and further ensures that the access request of
the mobile terminal is responded in time.

[0063] The access point provided in the embodiment of the presentation may
further lengthen the sending interval of a simplified Beacon frame to
lower the sending frequency of the Beacon frame, thereby further reducing
power consumption. Accordingly, in the power saving working mode, the
beacon frame sending interval used by the information broadcast module
402 for periodically broadcasting the simplified beacon frame is longer
than the beacon frame sending interval used in the normal working mode.
In the power saving working mode working mode, the BI may increase in a
gradual lengthening manner. However, the BI value cannot increase
unlimitedly. It is necessary to consider the balance between the Beacon
sending times reduced by increasing the BI and the time on which a
network is found by a newly come STA.

[0064] To further reduce power consumption, in the access point provided
in the embodiment of the presentation, after the information broadcast
module 402 broadcasts a simplified Beacon frame, in one BI, the working
mode switchover module 401 is further configured to: if no access request
message of the mobile terminal is received within the counting time,
disable an antenna and enable the AP enter the dormant state.

[0065] As an example but not a limitation, the access point provided in
the embodiment of the presentation is specifically an access point on a
Wi-Fi network.

[0066] The foregoing descriptions are merely preferred exemplary
embodiments of the present invention, but not intended to limit the
protection scope of the present invention. Any variation or replacement
that can be easily made by persons skilled in the art without departing
from the technical scope disclosed by the present invention shall fall
within the protection scope of the present invention. Therefore, the
protection scope of the present invention shall be subject to the
protection scope of the claims.

Patent applications by Guiming Shu, Shenzhen CN

Patent applications by Ping Fang, Shenzhen CN

Patent applications by Zhiming Ding, Shenzhen CN

Patent applications by Huawei Devices Co., Ltd.

Patent applications in class Signaling for performing battery saving

Patent applications in all subclasses Signaling for performing battery saving